Tongue state
Moist Black Coating
Schematic illustration, not a photograph
Schematic illustration, not a photograph.
Description
Coating grayish-black, slippery with abundant fluids, greasy or water-slick; tongue body typically pale and swollen.
Significance
Indicates yang vacuity with exuberant cold; declining kidney yang allows cold water to rise—a sign of extreme internal cold.
Related tongue states
Take a tongue photo and see which pattern is closest.
Open tongue check